Disassembling And Assembling Pistons And Connecting Rod - Skoda Octavia Workshop Manual

OCTAVIA

Disassembling and assembling pistons and connecting rod

For engine with identification characters AEG, APK, AQY and AZH
Note:
The engine should be attached with the engine
holder MP 1-202 and the spacer sleeves T30010
to the repair stand MP 9-101 for carrying out
removal and installation operations.
1 - Piston rings
♦ pay attention to different versions
♦ offset joints 120°
♦ use piston ring pliers for removing and
installing
♦ marking “TOP” must point toward pis-
ton crown
♦ oil scraper ring, 2-part
♦ inspecting gap clearance ⇒ Fig. 1
♦ inspecting end clearance ⇒ Fig. 2
2 - Piston
♦ pay attention to different versions
♦ inspecting ⇒ Fig. 3
♦ mark installation position relative to
conrod and matching cylinder with
waterproof felt pen
♦ arrow on piston crown points toward
belt pulley side
♦ piston ∅ = 82.465 mm
Edition 04.03
S00.5127.54.20
Crank Assembly
3 - Connecting rod
♦ pay attention to different versions
♦ always replace as a set
♦ mark matching cylinder see
-arrow B-
♦ installation position:
markings -A- must be positioned one
above the other and point to the belt
pulley side
♦ with oil drilling for lubricating piston pin
4 - Conrod bearing cap
♦ pay attention to different versions
♦ mark matching cylinder see
-arrow B-
♦ installation position:
markings -A- must be positioned one
above the other and point to the belt
pulley side.
5 - 30 Nm + torque a further 90° (¼ turn)
♦ replace
♦ oil thread and head contact surface
6 - Pressure relief valve, 27 Nm
♦ opens at:
0.25 to 0.32 MPa (2.5…3.2 bar) over-
pressure
♦ replace without sealant
7 - Oil spray nozzle
♦ for cooling piston
8 - Bearing shell
♦ pay attention to installation position
♦ do not mix up used bearing shells
(mark)
♦ ensure tightly seated in the retaining
lugs
♦ axial play
new part: 0.10 to 0.35 mm
wear limit: 0.40 mm
♦ with oil drilling for lubricating piston pin
9 - Cylinder block
♦ pay attention to different versions
♦ inspecting cylinder bore ⇒ Fig. 5
♦ cylinder ∅ = 82.51 mm
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